Colleague
Part of speech: noun
Definition: A fellow member of a profession, staff, academic faculty or other organization; an associate
Partner
Part of speech: noun
Definition: someone who is associated with another in a common activity or interest . . .# a member of a business or law partnership# a spouse or domestic partner# a dancing partner# either member of a pair in a card game or sports team
Part of speech: verb
Definition: to make or be a partnerto work or perform as a partner